1. (

• porous

) able to absorb fluids; "the partly porous walls of our digestive system"; "compacting the soil to make it less porous" ;

2. (

• porous ,
• poriferous

) full of pores or vessels or holes ;

3. (

• holey ,
• porous

) allowing passage in and out; "our unfenced and largely unpoliced border inevitably has been very porous" ;